Which correctly lists three different geologic features that help scientists determine the relative ages of rocks by their positions? magma, erosion, and intrusions erosion, magma, and cross-cutting relationships intrusions, index fossils, and magma index fossils, intrusions, and cross-cutting relationships

Apopulation of black bears depends on salmon from a stream for food. if a drought causes the stream to run dry one year, how will this likely impact the black bear population?

Diagram of the evolution of land plants?

Which of the following words best matches this definition: the process in which the best adapted organisms survive and pass on their traits, while those that are not well adapted do not survive to pass on their traits. question 3 options: acquired selection natural selection artificial selection organic selection